If the smoke shelf is not built properly and kept clean, the falling cold air can force the smoke and gas into the ______.
A. chimney
B. firebox
C. throat
D. hearth
Answer: B
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When making a conduit-to-box connection and a bonding wire will be installed, use a _____.
a. standard locknut b. sealing locknut c. grounding locknut d. plastic locknut
The sum of currents in each branch of a parallel circuit will ________ total circuit current
A) Be more than B) Be less than C) Equal D) None of these
Fire-resistance rating of an assembly is measured in units of
A) time. B) total heat released by assembly in fire test. C) pounds per square inch. D) rate of temperature increase of assembly during fire test. E) none of the above.
Corrugated stainless steel tubing (CSST) is used for natural-gas piping. CSST is a flexible piping system that is more difficult and more expensive to install than black pipe.
Answer the following statement true (T) or false (F)